I'm with you. I would love a single stack SK model, whether in the P30/P2000/VP9 family. I am expecting my CCW license someday (approved and continue to wait in the final processing stage). In anticipation, I have already "set up" for the three firearms I am allowed to have on my license. Although I own both the P30SK and P2000SK (with a preference for the P2000SK if anyone wondered), neither are on my 3-gun license because of the thickness of the pistols. Instead I have three "single stack" pistols on the license: XDs 3.3 .45ACP, M&P Shield 9mm, and Glock 42 .380ACP.
All are fine guns for what they do, but like most here on the forum I prefer the quality and accuracy of the HK pistols. Even the stinking California roster wouldn't keep me from paying 2-3x the retail (via Private Party Transfer) for a VP9SK "Schlank" (what "slim" would be in German).
I just wonder though...HK seems to be plenty busy providing arms to fulfill their existing contracts with municipalities around the world. When would they get around to developing a Schlank for civilians like me?